How much power does a 8800GT need anyway?

I just got in my 8800GT. I have an abit in9-32x-max m/b and it has a 4 pin molex connector below my last expansion port. I also have a Galaxy DX 1000w power supply. On the cable with the 6+2 pin for the 8800GT there is also a 4 pin molex that says for m/b only. Do I really have to connect the molex. I doesn't quite reach. Its getting power from the 6 pin and the PCI-E slot right? PS My m/b manual says the plug is for additional power for PCI-E devices. This is my first build so any help would be greatly appreciated. Thanks.

I believe that is for when you are using SLI, otherwise it is not needed.

OR it is for when you don't have a 24pin power plug for the motherboard.

If it is what I think, then you'd be safer with it plugged in. At least DFI recommended plugging it in on my nF4 Ultra-D. It shouldn't be too hard to find a molex extension cable.